| Oxygen Storage Capacity and Adsorptive Property of Praseodymium Oxides |
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| 作者姓名： | 万颖 马建新 方明 刘毅廷 |
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| 作者单位： | Department of Chemistry，Shanghai Normal University，Clean Energy (Automotive) Engineering Center，Tongji University，Institute for Environment and Sustainable Development，Hong Kong University of Science and Technology，Institute for Environment and Sustainable Development，Hong Kong University of Science and Technology Shanghai 200234，China，Shanghai 200092，China，Hong Kong，China，Hong Kong，China |
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| 基金项目： | Projectcombinedsupportedby“Tran CenturyTrainingProgramFoundationfortheTalents”andtheStateEducationCommis sionofChina (93 0 3 9) |
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| 摘 要： | Ceriumoxideisusedwidelyinthree waycatalystduetoitsoxygenstoragecapabilitywhichenablesthecatalysttooperatemoreefficientlybymakingitlesssensitivetothevariationofoxygenconcentrationinex haustgasstream1～ 3] .TheoxygenstoragecapabilityofceriastemsfromthevalencechangebetweenCe3+andCe4 +1,2 ] .Thereareafewotherelementswithvariableoxidationstatewithinthewholeseriesofrareearth .Praseodymiumisoneoftheelementswhichcanformaspectrumofoxygen deficientornonstoi chiometricPrOx.Ontheotherhand ,theproperti…
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Oxygen Storage Capacity and Adsorptive Property of Praseodymium Oxides |
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| Wan Ying ,Ma Jianxin.Oxygen Storage Capacity and Adsorptive Property of Praseodymium Oxides[J].Journal of Rare Earths,2003,21(6). |
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| Authors: | Wan Ying Ma Jianxin |
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| Affiliation: | Wan Ying ~1,Ma Jianxin ~ |
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| Abstract: | Oxygen storage and adsorptive properties of praseodymium oxides were investigated by pulse experiments and temperature-programmed desportion/reduction (TPD/TPR) experiments. Pr2O3 possesses the similar oxygen storage properties to CeO 2, and its dynamic oxygen storage capacity is 14.9 μmolg-1. The studies on TPD of O2, H2O and CO and TPR show that Pr2O3 provides more active sur face oxygen species and at a lower temperature than CeO2. It is suggested that Pr2O3 can be a well candidate as an oxygen storage component in automobile three-way catalyst. |
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| Keywords: | catalitic chemistry praseodymium oxides oxygen storage capacity TPD-TPR autocatalyst rare earths |
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